CN104461182A - Touch element and flat display device - Google Patents

Abstract

The invention discloses a touch element and a flat panel display device. In the flat panel display device, two direction sensing electrodes respectively representing an X-axis sensing element and a Y-axis sensing element are respectively disposed on both sides of a substrate of a color filter. One direction induction electrode is arranged in the black matrix on one side, and the other direction induction electrode is arranged on the other side opposite to the color filter, so that the flat panel display device with the touch function can have a thinner size, and has smaller panel signal interference.

Description

Touch element and flat display device

technical field

The present invention relates to a display device, in particular to a capacitive touch display device.

Background technique

Current touch panel technologies are divided into different touch input technologies such as capacitive, resistive, and optical, among which capacitive touch technology is the mainstream in the industry. Due to the difference in technology, the structure of capacitive touch panel is divided into different structures such as G/G (Out-cell), OGS (Out-cell), In-cell and On-cell, and the latter three are currently the main production Technology.

Among the structures of the above-mentioned capacitive touch panels, the first type (G/G) structure is the traditional structure of the capacitive touch panel. In this structure, a piece of glass is used as the base material to set the touch sensing element first, and then A higher-intensity protective glass (cover lens) is then arranged on the touch sensing element. Such a structure has the characteristics of high glass strength and low interference of electronic signals. However, due to the cumbersome process and the large thickness of the finished product, it cannot meet the current demand for thin and light touch display devices.

The second type (OGS) structure also concentrates the touch sensing elements on the same side (bottom surface) of the glass substrate, while the other side of the glass substrate is exposed on the top of the device for the user to touch. Compared with the G/G structure, the OGS structure simplifies the use of a piece of glass, but due to process factors, the OGS glass needs to be strengthened before cutting, and the strength of the cut glass will be higher than the strength of the cut and strengthened glass. Therefore, when the OGS structure is applied to products that are easy to fall and are subject to pressure, such as mobile phones and tablet computers, quality defects are prone to occur. On the other hand, compared with the G/G structure, the OGS structure is subjected to the black photoresist process first, followed by a series of magnetron sputtering processes, so there has always been a problem that the coating quality is difficult to control stably.

The third type (In-cell) structure is to set the touch sensing element between the color filter of the panel module and the thin-film-transistor layer (Thin-film-transistor layer, TFT layer), the fourth type (On-cell) The structure is to set the touch sensing element on the color filter (color filter, CF) of the panel module. Both types of touch structures can be protected by a protective glass with sufficient strength on the panel module, and the manufacturing process is relatively simple. However, since these two types of touch sensing elements are relatively close to the thin film transistor layer of the panel module, the electronic interference of the thin film transistor layer on the touch sensing element also composed of circuits is relatively large, and the third type of In-cell structure is more The fourth type of On-cell structure is more disturbed. Since this type of electronic interference is relatively large, if the electrode impedance is too high, it will be more difficult to analyze the touch signal, so it is extremely difficult to develop a large-sized touch panel using this type of technology.

Contents of the invention

In order to solve the above-mentioned problems of various capacitive touch panel structures, the present invention discloses a touch element and a flat display device having the touch element.

An embodiment of the present invention discloses a touch element, which includes a substrate, a black matrix, a first direction sensing electrode, a second direction sensing electrode and a color filter layer. The substrate has a first surface and a second surface opposite to each other. The black matrix is disposed on the first surface of the substrate, and the black matrix defines a plurality of pixel areas. The first direction sensing electrodes are arranged on the black matrix or included in the black matrix, and the second direction sensing electrodes are arranged on the second surface. The color filter layer has a plurality of color filter units, which are respectively arranged in a plurality of pixel areas defined by the black matrix, wherein the first direction sensing electrode is interposed between the substrate and the color filter layer between.

Another embodiment of the present invention discloses a flat panel display device, which includes a display substrate, the aforementioned touch element and a liquid crystal layer. The touch element is disposed on the display substrate, and the touch element includes a substrate, a black matrix, a first direction sensing electrode, a second direction sensing electrode and a color filter layer. The substrate has a first surface and a second surface opposite to each other. The black matrix is disposed on the first surface of the substrate, and the black matrix defines a plurality of pixel areas. The first direction sensing electrodes are arranged on the black matrix or included in the black matrix, and the second direction sensing electrodes are arranged on the second surface. The color filter layer has a plurality of color filter units respectively arranged in a plurality of pixel areas defined by the black matrix. The liquid crystal layer is disposed between the touch element and the display substrate.

In an embodiment of the present invention, the first direction sensing electrode is a metal electrode, and the second direction sensing electrode is a transparent conductive electrode.

In an embodiment of the present invention, wherein the first direction sensing electrodes are arranged on the black matrix, and include a plurality of first electrode strip units arranged in parallel along the first direction, and are separated from each other by a first interval, each A first electrode strip unit is a mesh structure. The first electrode strip unit is a metal mesh structure composed of a plurality of metal wires. The width of each metal wire is less than or equal to the line width of the black matrix where it is located, and the width of each metal wire is between 2-8 microns (μm). The width of each first electrode strip unit covers at least one row of pixel areas. The second direction sensing electrode includes a plurality of second electrode strip units arranged in parallel along the second direction and separated from each other by a second interval.

In an embodiment of the present invention, wherein the first direction sensing electrode is included in the black matrix, the black matrix has a first anti-reflection layer and a metal layer, and the first anti-reflection layer is disposed on the second Between one side and the metal layer, the first direction sensing electrode is formed by the metal layer. The touch element further includes a second anti-reflection layer disposed between the first anti-reflection layer and the metal layer. The first anti-reflection layer is an oxide layer, and the second anti-reflection layer is a nitride layer. The black matrix forms a plurality of first electrode strip units arranged in parallel along the first direction, and each first electrode strip unit has a mesh structure. Each first electrode strip unit is separated from each other by a pitch, and color filter units including at least two colors are stacked on each pitch.

Compared with the traditional in-cell or on-cell SITO structure (that is, a single-sided ITO structure that needs to be provided with a bridging insulating layer), the touch element of the present invention will represent the two sides of the X-axis sensing element and the Y-axis sensing element respectively. The two direction sensing electrodes are respectively arranged on both sides of the substrate, omitting the setting of the bridging insulating layer, and the X-axis sensing element and the Y-axis sensing element are respectively formed of different materials, such as opaque conductive materials (such as metal materials) respectively. Formed with transparent conductive materials (such as ITO). At the same time, one of the direction-sensing electrodes is set on the black matrix of the color filter or contained in the black matrix, and on the other side of the color filter relatively far away from the black matrix Another direction-sensing electrode is provided, so that the flat panel display device with touch function can have a thinner and thinner size, and also have smaller panel signal interference.

Description of drawings

FIG. 1 is a partial side view of a flat display device of the present invention.

FIG. 2 is a top view of the first embodiment of the touch element as a color filter of the present invention on the first surface of the substrate.

FIG. 3 is a cross-sectional view of the touch element in FIG. 2 along the line AA'.

FIG. 4 is a top view of the second surface of the substrate of the touch element.

FIG. 5 is a top view of the second embodiment of the touch element as a color filter of the present invention on the first surface of the substrate.

FIG. 6 is a cross-sectional view of the touch element in FIG. 5 along line BB′.

FIG. 7 is a top view of the third embodiment of the touch element as a color filter of the present invention on the first surface of the substrate.

FIG. 8 is a top view of the third embodiment of the touch element on the second surface of the substrate.

Wherein, the reference signs are explained as follows:

1 Flat panel display device

10 Display Substrate

22 first polarizer

24 Second polarizer

40,50,60 Touch elements

42 Substrate

44,54,64 Second direction sensing electrodes

45,65 Sensing electrodes in the first direction

46,56 Color filter layer

48,58,68 black matrix

421,521 First side

422,522 Second side

441,641 Second electrode strip unit

451,582,651 First electrode strip unit

461,462,463 Color filter units

481,581,681 pixel area

583 oxide layer

584 nitride layer

585 metal layer

Detailed ways

Certain terms are used in the description and claims to refer to particular elements. Those of ordinary skill in the art will appreciate that manufacturers may refer to the same element by different terms. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" mentioned throughout the specification and claims is an open-ended term, so it should be interpreted as "including but not limited to". Furthermore, the terms "coupled" or "connected" herein include any direct or indirect electrical or structural means of connection. Therefore, if it is described in the text that a first device is coupled/connected to a second device, it means that the first device may be directly electrically/structurally connected to the second device, or indirectly electrically/structurally connected through other devices or connecting means. to the second device.

Please refer to FIG. 1 , which is a partial side view of the flat panel display device of the present invention. The flat panel display device 1 is a display with a touch function, comprising a display substrate 10, a touch element 40, a first polarizer 22 and a second polarizer 24, wherein the display substrate 10 and the touch element 40 are arranged There is a liquid crystal layer (not shown in the figure). The display substrate 10 is provided with a pixel driving element, such as a thin film transistor (TFT), and the touch element 40 is a touch color filter, which is arranged on the display substrate 10, and the first polarizer 22 is arranged on the touch element. 40, a protective glass (not shown in the drawings) can be added on it, and the second polarizer 24 is under the display substrate 10, and there is another backlight module and other necessary components under it. For the sake of illustration, Fig. 1 Only part of the structure is shown, and other necessary elements belonging to the flat panel display device 1 are omitted.

Please refer to FIG. 2 and FIG. 3 , wherein FIG. 2 is a top view of the first embodiment of the touch element as a color filter of the present invention on the first surface of the substrate, and FIG. 3 is the touch element AA' of FIG. 2 Cutaway view of the line. In the first embodiment, the touch element 40 has a substrate 42, and the substrate 42 has a first surface 421 and a second surface 422, wherein the first surface 421 is a surface provided on the display substrate 10, and the surface of the substrate 42 The first polarizer 22 and the protective glass are disposed on the second surface 422 . The first surface 421 of the substrate 42 of the touch element 40 has a non-conductive black matrix 48 . The black matrix 48 defines a plurality of pixel regions 481, and a color filter layer 46 is formed on the pixel region 481. The color filter layer 46 has a plurality of color filter units 461, 462, 463, which are respectively arranged on the black matrix 48. Within a plurality of pixel regions 481 . More specifically, the color filter layer 46 provides filter units of different colors, for example, the color filter unit 461 is a red filter unit, the color filter unit 462 is a green filter unit, and the color filter unit 463 is a blue filter unit. filter unit. Under the color filter layer 46 , a common electrode layer (not shown) is usually provided to drive the liquid crystal in the liquid crystal layer between the display substrate 10 and the touch element 40 to turn.

In the touch element 40 of the present invention, the direction sensing electrodes required for touch sensing are respectively arranged on both sides of the color filter, that is to say, the touch element 40 includes a first direction sensing electrode 45 and a The second direction sensing electrodes 44 (both partially displayed). The first direction sensing electrode 45 is a metal electrode, which is arranged on the black matrix 48 of the first surface 421, while the second direction sensing electrode 44 is arranged on the substrate 42 in the form of a transparent conductive layer (such as an indium tin oxide conductive layer, ITO). On the second side 422 of the. Between the black matrix 48 and the first surface 421, or between the black matrix 48 and the first direction sensing electrode 45, an additional layer of anti-reflection layer (not shown in the drawings) can also be added to make the black matrix 48 have better Opaque. It should be noted that in the embodiment shown in FIG. 2, the first direction sensing electrode 45 includes a plurality of first electrode strip units 451, and each first electrode strip unit 451 includes a plurality of conductive wires parallel to each other to form a network. The electrode strip units are separated from each other by a first interval, and the first interval is at least equal to or greater than a pixel width. As shown in FIG. 2 , these mesh conductive lines are correspondingly formed along the matrix structure of the black matrix 48 . Preferably, the plurality of first electrode bar units 451 are formed by a metal mesh structure (metal mesh) composed of a plurality of metal wires, and the width of these metal wires is less than or equal to the line of the black matrix 48 where it is located. Width, and actually, the width of each metal wire preferably falls between 2-8 micrometers (μm). As mentioned above, since the general pixel resolution is relatively much larger than the touch resolution, the width of each first electrode strip unit 451 of the first direction sensing electrode 45 can cover one or more rows of pixel regions 481, and in FIG. 2 In the middle, the region 481 covering two rows of pixels is taken as an example.

Please refer to FIG. 4 together. FIG. 4 is a top view of the second surface of the substrate of the touch element. The second direction sensing electrodes 44 on the second surface 422 of the substrate 42 also include a plurality of second electrode bar units 441 extending along the Y direction, parallel to each other and separated from each other by a second interval. It can be seen from FIG. 2 and FIG. 4 that the first direction sensing electrodes 45 are arranged in parallel along the X direction, while the second direction sensing electrodes 44 on the second surface 422 of the substrate 42 are arranged along the Y direction. The first-direction sensing electrodes 45 and the second-direction sensing electrodes 44 respectively formed on both sides are X-axis electrodes and Y-axis electrodes that are perpendicular to each other. It is worth mentioning that, in this embodiment, the second direction sensing electrodes 44 are formed by a transparent conductive layer (such as an indium tin oxide conductive layer, ITO), and each second direction sensing electrode 44 has a sheet-like structure .

Please refer to FIG. 5 and FIG. 6, wherein FIG. 5 is a top view of the second embodiment of the touch element as a color filter of the present invention on the first surface of the substrate, and FIG. 6 is the touch element of FIG. 5 along the Sectional view of line BB'. In the second embodiment, the first surface 521 of the substrate 52 of the touch element 50 is provided with a conductive black matrix 58, which is an opaque metal layer. The matrix 58 serves as a first direction sensing electrode. Similarly, the black matrix 58 is formed with a plurality of pixel regions 581 , and a color filter layer 56 is further formed on the pixel regions 581 . In FIG. 6, the black matrix 58 may include an oxide layer 583, a nitride layer 584, and a metal layer 585. Since the opaque metal layer 585 may produce reflection, the oxide layer 583 (first anti-reflection layer) and nitride layer 584 (second anti-reflection layer) as the anti-reflection layer, so that the black matrix 58 has better opacity and anti-reflection properties. In addition, the metal layer 585 may be made of metals such as chromium, molybdenum, silver, boron, or aluminum. It should be noted that in the embodiment shown in FIG. 5, the black matrix 58 as the first direction sensing electrode also includes a plurality of first electrode bar units 582, and each first electrode bar unit 582 also includes a plurality of parallel electrodes. The conductive wires form a mesh electrode strip, which is a mesh structure. Each first electrode strip unit 582 needs to be separated from each other with a gap G to prevent electrical conduction with each other; because the gap G between each first electrode strip unit 582 may cause light leakage, so as shown in FIG. 6 As shown, two layers of color filter units of different colors (for example, a red photoresist and a green photoresist are stacked) are stacked on the interval G to shield light leakage. However, in another implementation manner, three layers of color filter units (not shown in the drawings) of different colors can also be stacked on the gap G to enhance its light-shielding effect. As mentioned above, since the general pixel resolution is relatively much larger than the touch resolution, each first electrode bar unit 582 can cover multiple rows of pixel areas 581, and in FIG. 6, it covers two rows of pixel areas 581 as an example. .

In FIG. 5 , a plurality of first electrode strip units 582 as the first direction sensing electrodes are also arranged along the X direction, and the plurality of second electrode strips of the second direction sensing electrodes 54 on the second surface 522 of the substrate 52 The units are arranged along the Y direction, which is similar to the first embodiment shown in FIG. 4 .

Please refer to FIG. 7 and FIG. 8, wherein FIG. 7 is a top view of the third embodiment of the touch element as a color filter of the present invention on the first surface of the substrate, and FIG. 8 is the third implementation of the touch element. A top view on the second side of the substrate. The first electrode strip units 451 , 582 and the second electrode strip unit 441 in the foregoing embodiments are strip electrodes arranged along the X direction and the Y direction, respectively. In the third embodiment of the touch element 60, the first direction sensing electrode 65 is similar to the embodiment in FIG. For the bar units 651 , the conductive wires contained in each first electrode bar unit 651 cover a plurality of pixel regions 681 in a serial form of a plurality of rhombic meshes. Correspondingly, on the second surface shown in FIG. 8 , the second direction sensing electrode 64 also includes a plurality of second electrode strip units 641, and each second electrode strip unit 641 is composed of a plurality of diamond-shaped sheet units in series. form, and the position it covers is complementary to the first electrode strip unit 651. As shown in FIG. Wherein, the second electrode bar unit 641 is formed by a transparent conductive layer (such as an indium tin oxide conductive layer, ITO).

Compared with the traditional in-cell or on-cell SITO structure (that is, a single-sided ITO structure that requires a bridging insulating layer), the touch element of the present invention will represent the X-axis sensing element and the Y-axis sensing element respectively. The two direction sensing electrodes are respectively arranged on both sides of the substrate, omitting the setting of the bridging insulating layer, and the X-axis sensing element and the Y-axis sensing element are formed of different materials, for example, they are made of opaque conductive materials (such as metal materials) ) and transparent conductive materials (such as ITO). At the same time, one of the direction-sensing electrodes is arranged on the black matrix of the color filter or included in the black matrix, and another direction-sensing electrode is arranged on the other side of the color filter relatively far away from the black matrix, so that there is a touch sensor A functional flat panel display device can have a thinner and thinner size, and also have smaller panel signal interference.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (20)

1. a touch control component, includes:

Substrate, has first surface respect to one another and second;

Black matrix, is arranged on the described first surface of described substrate, and described black defined matrix goes out multiple picture element region;

It is characterized in that, described touch control component includes:

First direction induction electrode, be arranged on described black matrix or be included in Suo Shu ?in matrix;

Second direction induction electrode, is arranged on described second; And

Chromatic filter layer, has multiple colored light-filtering units, and be separately positioned in multiple picture element regions that described black matrix defines, wherein said first direction induction electrode is between described substrate and described colorized optical filtering interlayer.

2. touch control component as claimed in claim 1, it is characterized in that, wherein said first direction induction electrode is metal electrode, and described second direction induction electrode is transparency conductive electrode.

3. touch control component as claimed in claim 1, it is characterized in that, wherein said first direction induction electrode is arranged on described black matrix, and comprise multiple first electrode strip unit arranged in parallel along first direction, and being separated by the first interval, each first electrode strip unit is reticulate texture.

4. touch control component as claimed in claim 3, is characterized in that, the metallic netted structural that wherein said first electrode strip unit is made up of multiple plain conductor.

5. touch control component as claimed in claim 4, it is characterized in that, wherein the width of each plain conductor is less than or equal to the line width of the described black matrix at position place of institute.

6. touch control component as claimed in claim 4, it is characterized in that, wherein the width of each plain conductor is between 2 ~ 8 microns.

7. touch control component as claimed in claim 3, it is characterized in that, wherein the width of each the first electrode strip unit contains row's picture element region.

8. touch control component as claimed in claim 3, it is characterized in that, wherein said second direction induction electrode comprises multiple second electrode strip unit arranged in parallel along second direction, and is separated by the second interval.

9. touch control component as claimed in claim 1, it is characterized in that, wherein said first direction induction electrode is included in described black matrix, described black matrix has the first anti-reflecting layer and metal level, described first anti-reflecting layer is arranged between described first surface and described metal level, and described first direction induction electrode formed by described metal level.

10. touch control component as claimed in claim 9, it is characterized in that, described touch control component comprises the second anti-reflecting layer further, is arranged on described first anti-reflecting layer and described metal interlevel.

11. touch control components as claimed in claim 10, it is characterized in that, wherein said first anti-reflecting layer is oxide skin(coating), and described second anti-reflecting layer is nitride layer.

12. touch control components as claimed in claim 9, is characterized in that, wherein said black matrix forms multiple first electrode strip unit arranged in parallel along first direction, and each first electrode strip unit is reticulate texture.

13. touch control components as claimed in claim 9, is characterized in that, wherein each first electrode strip unit is separated by a spacing, and each spacing stacks the colored light-filtering units comprising two kinds of colors.

14. 1 kinds of flat display apparatus, include:

Display base plate;

It is characterized in that, described flat display apparatus includes:

Touch control component, be arranged on described display base plate, described touch control component includes:

Substrate, has first surface respect to one another and second;

Black matrix, is arranged on the described first surface of described substrate, and described black defined matrix goes out multiple picture element region;

First direction induction electrode, be arranged on described black matrix or be included in Suo Shu ?in matrix;

Second direction induction electrode, is arranged on described second; And

Chromatic filter layer, has multiple colored light-filtering units, is separately positioned in multiple picture element regions that described black matrix defines; And

Liquid crystal layer, is arranged between described touch control component and described display base plate.

15. flat display apparatus as claimed in claim 14, it is characterized in that, wherein said first direction induction electrode is metal electrode, and described second direction induction electrode is transparency conductive electrode.

16. flat display apparatus as claimed in claim 14, it is characterized in that, wherein said first direction induction electrode is arranged on described black matrix, and comprise multiple first electrode strip unit arranged in parallel along first direction, and being separated by the first interval, each first electrode strip unit is reticulate texture.

17. flat display apparatus as claimed in claim 16, it is characterized in that, wherein the cancellated line width of each the first electrode strip unit is less than or equal to the line width of the described black matrix at position place of institute.

18. flat display apparatus as claimed in claim 14, it is characterized in that, wherein said first direction induction electrode is included in described black matrix, described black matrix has the first anti-reflecting layer and metal level, described first anti-reflecting layer is arranged between described first surface and described metal level, and described first direction induction electrode formed by described metal level.

19. flat display apparatus as claimed in claim 18, is characterized in that, wherein said black matrix forms multiple first electrode strip unit arranged in parallel along first direction, and each first electrode strip unit is reticulate texture.

20. flat display apparatus as claimed in claim 19, is characterized in that, wherein each first electrode strip unit is separated by a spacing, and each spacing stacks the colored light-filtering units comprising two kinds of colors.